Science: Man of Pompeii

"Mount Vesuvius was blazing in several places ... A black and dreadful
cloud bursting out in gusts of igneous serpentine vapor now and again
yawned open to reveal long, fantastic flames, resembling flashes of
lightning, but much larger . . . Cinders fell . . . then pumice-stones
too, with stones blackened, scorched and cracked by fire."

The scene described by Pliny the Younger occurred on an August afternoon
in 79 A.D. Of the more than 20,000 inhabitants in the city of Pompeii,
several hundred died that day in their homes and in the streets. The
rest fled toward the sea.